论文部分内容阅读
以硝酸铋和硫化钠为原料,用两步水热法于100℃成功制备了正交晶系Bi2S3微米环;又以硝酸铋和硫脲为原料,采用一步水热法于150℃制备了同属于正交晶系的Bi2S3纳米棒。分别以X射线衍射仪、场发射扫描电镜、透射电子显微镜和荧光分光光度法等测试手段对最终产物的物相、形貌和性质进行了表征,探讨了Bi2S3微米环的形成机理。结果表明:Bi2S3微米环的内径为1～1.5μm、外径为1.5～2μm,由平均尺寸大约为100nm的纳米晶粒组装而成。Bi2S3纳米棒的直径约125nm、长度为1～2μm。Bi2S3微米环和纳米棒状Bi2S3的发光峰分别位于447nm处和470nm处,Bi2S3微米环发光峰的位置相比于Bi2S3纳米棒的发光峰位置明显发生了蓝移。
Bismuth nitrate and sodium sulfide were used as raw materials to prepare orthorhombic Bi2S3 micrometer ring by two-step hydrothermal method at 100 ℃. Bismuth nitrate and thiourea were used as raw materials. Belongs to the orthorhombic Bi2S3 nanorods. The phase, morphology and properties of the final product were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and fluorescence spectrophotometry. The formation mechanism of Bi2S3 microrings was discussed. The results show that the Bi2S3 micrometer ring has an inner diameter of 1 ~ 1.5μm and an outer diameter of 1.5 ~ 2μm. The Bi2S3 micrometer ring is assembled by nanocrystalline grains with an average size of about 100nm. Bi2S3 nanorods have a diameter of about 125 nm and a length of 1-2 μm. The luminescence peaks of Bi2S3micron ring and nanorodal Bi2S3were located at 447nm and470nm, respectively. The position of Bi2S3micron ring luminescence peak obviously shifted blue compared with that of Bi2S3 nanorod.